Using the S-Function Target with MATLAB R13 - dSPACE

FAQ 200
Using the S-Function Target with MATLAB R13
Keywords
MATLAB ® R13, S-Function Target
Question
Using the S-Function Target with MATLAB R13
FAQ Version: 1 / 2010-12-29
Page 1
dSPACE FAQ 200
Why is the compiling process of generated code aborted with the error message
#error 'Code was generated for compiler with different sized .'
if the model contains an S-Function generated by Real-Time Workshop ® 's S-Function Target?
Solution
Due to a limitation in Real-Time Workshop, S-Functions generated by the Real-Time Workshop S-
Function block (S-Function Target) are no longer target-independent and, therefore, cannot be
compiled for the dSPACE platforms DS1003, DS1102 and the AlphaCombo (DS1003+DS1004). This
is because Real-Time Workshop always uses the data type definitions of the host computer (where
MATLAB ® and the code generation process are executed), and not the data type definitions that are
valid for the chosen real-time target.
As a consequence the compiler issues the above-mentioned error message. This is necessary
because the generated S-function code probably would not execute correctly on the real-time target.
To get a workaround for the S-Function Target
1. Download the rtwsfcn_rtw_info_hook.m file (rtwsfcn_rtw_info_hook.zip)
2. Copy the file to each %DSPACE_ROOT%\MATLAB\RTI\M folder of your installation.
This file is needed for correct code generation with the S-Function target for the
dSPACE platforms listed above. It is not sufficient to copy this file to your
dSPACE installation after the S-Function has already been built.
To check whether MATLAB finds the correct file, enter the command
which rtwsfcn_rtw_info_hook
This should display the folder you copied the downloaded M file to, i.e.,
%DSPACE_ROOT%\MATLAB\RTI\M.

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Using the S-Function Target with MATLAB R13
FAQ Version: 1 / 2010-12-29
Page 2
dSPACE FAQ 200
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